Free Shipping Offers are for Standard Ground Delivery service and are only valid for shipping addresses within the 48 Contiguous United States. Truck freight and oversize charges still apply unless otherwise notes and can only be shipped to the lower 48 States.Same Day Shipping (on most parts) if you order by 5PM EST on a business day. We ship via UPS Ground and/or USPS to all locations in the Continental 48 States.

Product Resources

Horsepower and Torque. Improve the performance of your 4.6L GT Mustang by replacing those restrictive stock manifolds with a set of 1-5/8" LTH Long Tube Headers for an increase in horsepower and torque. LTH headers were developed to give you the best balance of low end and top end power when installed with a matching LTH shorty Mid Pipe.

LTH Titan™ Uniform Satin Finish. Titan™ is LTH's unique proprietary process that produces a bright uniform satin finish over the entire part to eliminate the ugly discoloration from welds, heat, and scratches that are encountered during manufacturing; making it the perfect exhaust finish for high end show cars. Not only does the process create a show quality finish, but it also strengthens the stainless steel to eliminate microscopic sharp edges created during welding that could, if not removed, become tears and cause the product to fail.

Required Upgrade. For proper operation and maximum power potential these Long Tube Headers will require reprogramming the vehicles computer. AmericanMuscle recommends a Bama custom tune with a Mustang Handheld Tuner to reprogram the vehicles ECU for proper operation.

Application. These 1-5/8" LTH Long Tube Headers are designed to fit the 2005-2010 GT and Bullitt Mustangs equipped with the 4.6L 3V SOHC Modular V8 engine. LTH long tube headers will require the use of a LTH shorty Mid Pipe in order to be installed properly (see option above).

Technical Note: This LTH product is intended for off road use, and is not legal for use in emission restrictive states.

LTH 1-5/8 in. Long Tube Headers (05-10 GT)

Word on The Street

It is very unfortunate that not every single business in the world has the same selection, speed, ease of ordering, communication, and great customer service...but then again, the fact that very few other merchants can compete makes it a whole lot easier to know who to choose.

Meet Our Team

I am 49 years old and this is my first Mustang, in the high school years I owned and built Mopars starting with a 76 Volarie with a complete engine build with a 340 6 Pak ground cam .576 lift 278 duration the thing was pretty crazy for back then. As the years passed I got into the truck scene and bu...